Over the past few months, the two have been open about their relationship on social media. The two first sparked dating rumors in July.

Last month, Lovato even gushed about Guilherme, telling Ellen DeGeneres, "Isn’t he cute? He’s so cute! I’m very happy. Life is really good.” Watch!

Amid the breakup, Lovato is collaborating with activewear brand Fabletics, co-founded by Kate Hudson, on a limited edition capsule collection of tops, leggings, and jackets based on Demi’s mission to empower women.